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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************

    Nintendo Entertainment System - Miracle Piano Keyboard

**********************************************************************/

#ifndef MAME_BUS_NES_CTRL_MIRACLE_H
#define MAME_BUS_NES_CTRL_MIRACLE_H

#pragma once

#include "ctrl.h"
#include "bus/midi/midi.h"


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> nes_miracle_device

class nes_miracle_device : public device_t,
							public device_serial_interface,
							public device_nes_control_port_interface
{
public:
	// construction/destruction
	nes_miracle_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	required_device<midi_port_device> m_midiin, m_midiout;

protected:
	static constexpr int XMIT_RING_SIZE = 64;
	static constexpr int RECV_RING_SIZE = 64;
	static constexpr device_timer_id TIMER_STROBE_ON = 0;

	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
	virtual void device_add_mconfig(machine_config &config) override;

private:
	// serial overrides
	virtual void rcv_complete() override;    // Rx completed receiving byte
	virtual void tra_complete() override;    // Tx completed sending byte
	virtual void tra_callback() override;    // Tx send bit

	void xmit_char(uint8_t data);

	virtual uint8_t read_bit0() override;
	virtual void write(uint8_t data) override;

	emu_timer *strobe_timer;

	int m_strobe_on, m_midi_mode, m_sent_bits;
	uint32_t m_strobe_clock;
	uint8_t m_data_sent;
	uint8_t m_xmitring[XMIT_RING_SIZE], m_recvring[RECV_RING_SIZE];
	int m_xmit_read, m_xmit_write;
	int m_recv_read, m_recv_write;
	bool m_tx_busy, m_read_status, m_status_bit;
};

// device type definition
DECLARE_DEVICE_TYPE(NES_MIRACLE, nes_miracle_device)

#endif // MAME_BUS_NES_CTRL_MIRACLE_H